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Question

? cii Seare https.//ucitblac bard.com/webapp 29792 18&ccurse; id35844 1&contentide; 1055850 1astep null Take Test: Assignment 4 working 2 Test Intormation Sam oe th qikatlons may rw ira you to think abúut te matarial and read thùm twice in order to provida tha enract anavuar Ihank yau and good uck Dr Goring Instructio Force Camplction This test can ba zavedand rezumed later QUESTION 1 2polnts Sue Ansner PCisl-1.25 M.PCl-0.474MC1-0.474 M [PCl5] _ 1.00 ?.PCI3-1.00 M, [CIzl_ 1.00 M cj-020 chi 0222 M, h0222 M nel Saue and Suwir to saue and swbowit.cher Sane A AnaRrs to saue aanRTS. OEAnewersCs Ciose window Search Vaindows

Explanation / Answer

PCl5(g) --------------- PCl3(g) + Cl2(g)

0.250                           0                 0

-x                                 +x               +x

0.250-x                        +x             +x

Kc= 1.80

Kc=[PCl3][Cl2]/[PCl5]

1.80 = x*x/(0.250-x)

for soving the equation

x=0.222

at equilibrium

[PCl5]=0.250-x= 0.250-0.222=0.028M

[PCl3]=x=0.222M

[Cl2]=0.222M

The answer is D.

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